Over the weekend, CASthe dark, mystery man of British rap—popped up and dropped the brilliant "6PM" online. Moody synths and haunting strings are wonderfully layered by producer WLVE, as the emcee vividly details his most depraved thoughts. Despite serving up not the most easily digestible brand of rap (and grime), it's this gloomy British wit, wordplay, and creativity that's seen CAS win a legion of fans over the years:

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